Numerical control device for transfer machines
AssigneeFanuc Corporation
InventorsYoshiaki Ikeda, Nobuyuki Kiya, Shoichi Otsuka
Life of this patent
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Abstract
A numerical control device adapted to control a plurality of transfer machines mounted on a transfer line. The numerical control device is composed of an NC section (13) for controlling the axes of the transfer machines and a PMC section (14) for executing sequence control. The PMC section (14) reads current position data from a current position register (16) of the NC section (13) through a window, and compares the read data with previously set zone data (19). A function instruction (18a) delivers the result of the comparison as a zone signal, and executes a modification control of an execution sequence by using the zone signal. Therefor, a high-accuracy region signal can be set.
Claims4
A numerical control device for controlling a plurality of transfer machines mounted on a transfer line, comprising:
- axis control means for controlling axes of the plurality of transfer machines;
- and
- PMC control means for executing a sequence control of the plurality of transfer machines, said PMC control means including:
- function instruction means for reading current position data from said axis control means, comparing the read data with previously set zone data, outputting a result of the comparison as a zone signal, and executing a modification control of an executing sequence by using the zone signal.
A method for controlling a plurality of transfer machines mounted on a transfer line in a numerical control device including a programmable machine controller, said method comprising the steps of:
- a) controlling axes of the transfer machines and the programmable machine controller;
- b) executing sequence control;
- c) reading current position data through a window of current position register means;
- d) comparing read data with previously set zone data;
- e) outputting the comparison result as a zone signal;
- and
- f) executing modification control of an execution sequence in accordance with the zone signal for controlling the function of the programmable machine controller.
Dependencies are inferred from the claim text.